/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hama.bsp.sync;

import java.util.concurrent.Callable;

import org.apache.hadoop.conf.Configuration;

/**
 * Thread runner for a sync server.
 * 
 */
public class SyncServerRunner implements Callable<Object> {

  private SyncServer syncServer;

  // use the SyncServiceFactory to obtain a new instance.
  SyncServerRunner(Configuration conf) {
    try {
      syncServer = SyncServiceFactory.getSyncServer(conf);
    } catch (ClassNotFoundException e) {
      e.printStackTrace();
    }
  }

  public Configuration init(Configuration conf) throws Exception {
    return syncServer.init(conf);
  }

  public void stop() {
    syncServer.stopServer();
  }

  @Override
  public Object call() throws Exception {
    syncServer.start();
    return null;
  }

  @Override
  protected void finalize() throws Throwable {
    syncServer.stopServer();
  }

}
